Frozen Rails: Magenta - The Art Of Abstraction

Transcript

1. Magenta The Art of Abstraction
6. “Anything that is in the world when you’re born is normal and ordinary and is just a natural part of the way the world works. ! Anything that's invented between when you’re fifteen and thirty-five is new and exciting and revolutionary and you can probably get a career in it. ! Anything invented after you're thirty-five is against the natural order of things” –Douglas Adams
7. Computer Science
8. Colour Perception
10. Conclusion spoiler alert
11. Abstraction happens in our minds
12. Abstractions shape how we perceive things
13. Changing abstractions is a basic principle of innovation and progress
14. Abstraction is the basis of Computer Science
15. Abstraction is the basis of Computer Science
21. Trichromacy
26. Patterns and Algorithms
36. ?
37. ?
40. Is magenta real?
41. # FF00FF
44. Data Abstraction
46. “Dataless Programming” RM Balzer - 1967
49. Space
53. Wait, what?
54. Are we still talking about abstraction?
59. # FF00FF
60. Control Abstraction
61. Subroutines
62. “Go To Statement considered harmfull” Edsger Dijkstra, 1968
63. “Protection in Programming Languages" James H. Morris Jr., 1973
65. You should be able to reason about modules in isolation
66. “Global Variables Considered Harmful” W.A. Wulf, M. Shaw, 1973
67. Tetrachromacy
69. 2-3% of all women? 50% of all women?
70. Gene on X chromosome OPN1MW and OPN1MW2
71. Women could have up to six colour cones
72. Mostly dysfunctional
73. At least two confirmed cases
74. Seeing millions of more colours
80. Object Oriented Programming
83. #alankayholdingthings
85. –Alan Kay “OOP to me means only messaging, local retention and protection and hiding of state- process, and extreme late-binding of all things.”
86. Data Abstraction + Control Abstraction = Object Oriented Programming
87. Why dysfunctional? (my own unscientific theory)
88. We don’t see colours with our eyes
89. We see colours with our brain
90. Our brain adjusts colours
91. We don’t see colours we don’t have an abstract concept for
93. When we learn to speak, colour perception switches from left brain side to right brain side
94. We make the rules
95. Some rules enable good programs (For some definition of good.)
96. Single Responsibility Principle
97. Liskov Substitution Principle
98. Law of Demeter
99. Don’t abstract too much, too early
101. Strong external abstractions allow weak internal abstractions
102. Distributed Applications
103. Is magenta a colour?
105. Yes
106. Inheritance
107. Type Hierarchy Liskov Substitution Principle
108. Implementation Sharing
109. Mixins
110. Composition
111. Duck Typing
112. Are we doing it right?
113. Classes ≠ OOP
114. Colour and Abstraction
117. Himba Tribe (Namibia)
119. zuzu: dark shades of blue, red, green and purple ! vapa: white, some shades of yellow ! buru: some shades of green and blue ! dambu: some shades of green, red and brown
122. Abstractions and Security
123. Most attacks rely on switching up or down abstraction levels
128. Abstraction
129. Business Logic only exists in our minds
130. Object Oriented Programming only exists in our minds
131. Colours only exist in our minds
132. UI elements only exist in our minds
133. Countries only exist in our minds
134. Conclusion
135. Abstraction happens in our minds
136. All abstraction
137. Abstractions shape how we perceive things
138. Changing abstractions is a basic principle of innovation and progress
139. Thanks! @konstantinhaase me@rkh.im